[dagit] Upgrade eslint packages
Summary: I ran into some annoying build issues with eslint, so I'm trying an upgrade on a handful of packages to see if they'll go away.
Test Plan: Buildkite, run dagit and verify that it loads.
Reviewers: bengotow, prha, sashank
Reviewed By: prha
Differential Revision: https://dagster.phacility.com/D6031